Sound-box for talking-machines.



PATENTED OCT. 1, 1907.

J. H. ELFERING. sown BOX FOR TALKING MACHINES.

APPLICATION $15217 HOT, 12, 1904.

thereof may be easily adjusted to give the dirrect presparts of the casing of the soundbox together, so that uisite pressure upon the parts for holding the dial0 Figure l-is an end elevation of a sound boxembody- .35 the inner portion of the sound boxoasing, which is PATENT- oFFIeE.

JOHN H. ELFERING, OF CAMDEN, NEW JERSEY, ASSIGNOR TO VICTOR TALKING MACHINE COMPANY, A CORPORATION OF NEW JERSEY.

. 'sOUND-BOX Eon TALKING-MACHINES.

To all it may concem:

Be it known that I, Ion x H. Enrsmxo, a'eitizen of the United States, and a resident of the city of Camden; State of New Jersey, have invented certain newfi andfuseful'lmprovements in Sound-Boxes for Talkleg-Machines, of which the following is alull, clear,

\and complete disclosure.

q The object of myinvention is to provide such a con- .struction in sound boxes, that the parts of the casing sure .upon the parts for holding the diaphragmin posi- ,tion. I

I fleretofore, in the construction of sound boxes, it has beenv customary in someinstances to force the the saint? are retained relatively iii position by friction. The, difficulty has been experienced in this manner of assembling the parts of a sound box arising from the fact'that the exact amount of force to produce the reqpluagm, cannot be accurately determined, thereby causing considerable variation in the efficiency and ,quali ty of-reproduction in different sound boxes.

My invention is designed to efficiently overcome these objections.

For a full, clear and exact description of one embodiment of my invention, reference may be had-to following specification and to the Accompanying drawing forming a thereof, in. which ing my improvements; Fig. 2 is a. central, longitudi nal, sectional view thereof, and Fig. 3 is a rear elevation thereof.

Referring to the drawing, the numeral 1 indicates preferably p'mvided with an external cylindrical flange 2. The outor cylindrical portion 3 ofthe rit'llilil blrx casing is adapted to fit over mid cylindrical flange 2, and is slidubly retained thereon. The interior of portions 1 audit of the soulul'lmx easing are provided with low flanges 4 and 5, 'upon whichnre seated the usual gaskets, lmtween which is retained the diaphragm 7. The stylus bar 8 is pivolnlly mounted upon the portion Iiuithc sound box casing in the usual, l5 or any suitable manner, and is connected with the dinphmgm by the usual (onneetion or wire 9. The eylindricul flange 2 is'pmvided with openings l0, and the cylindri al portion 3 will: screw-illrended openings 1], which are smaller than the openings l0 in the eylindricnl flangr2. Machine screws 12 pass loom-1y through the ormnings l0 and color the screw-LIIrcuded Specification of Letters Patent. Application filed N vember 12, 1904. Saris-1102332392,

opicnings ll in the cylindrical portion- 3. it will be Patented'Oet. 1,1907.

noted that the openings 10 are greaterin diameter than the diameter of the screws 12, thereby allowing a slight range for adjustment of the portions 1 and 3 of the casing relatively.

In assembling the parts of the sound box, the stylus bar, diaphmgm, and gaskets are placed in position within the cylindrical casing 3, the portion- 1 of the casing is inserted within the cylindrical portion 3, so that its flange 4 abuts against the adjacent gzt letli. The $Cl(:WH 3l0 then insertcd'in the o xenings as above described, and after the requisite pressure has been given to the parts of the sound box casing to clzunp the diaphragm in position, the screws are set tightly in position, thereby holding the parts of the casings together with the correct pressure upon the gaskets. In this mannereach sound box is l'nade substantially like every other sound box and the pressure upon the diaphragm may be relied upon to be the same in each instance without resorting to exporinnrnts to determinev how firmly or how loosely the diaphragm is held in position. V

I have thus produced a decided advance in the facilitycase accumcy, and speed in which sound boxes may manufactured, in addition to producing the greater reliability and uniformity in the finished article. r

' Having thus described my invention, it will be obvious that certain changes may be made in the form, arrangement, and proportion of parts, without departing from the spirit and scope of my invention, but

What I claim and desire to protect by Letters Patent of the United States, is: i

1. In a sound box for talking'm aehines, the combiuu- 5 tlon with the diaphragm thereof, of n casing for said diaphragm composed of-two relatively longitmlinnlly slld able parts, and means passing through both parts inserted from the inside of the inner member for retaining said parts adjustably in position. t

2. In a sound box [or lnlking nuichines, the combination with the diaphragm thereof, of a casing for said diaphragm comprising two telescoping pnrls, and means passing lhrough both parts inserted from the inside of -lllc inner member for holdim; snid parts ndjustnhly ill their relative positions.

2!. in n sound box [or tnlkhn. machines, the combination with the diaphragm thereof, of :1 casing for said diaphragm comprising two longitinlinnlly slidnhlc telescoping parts, and menus passing lhroiurh both parts insorlcd from the inside of the. inner member for holding said parts ndjnslnhly in their relative positions.

4. in :1 sound box for tnlkim. machines, the co|nbinu-' Lion with the diaphragm thereof, ol. :1 cnsin for said diaphragm comprising two longitudinally slidnhle telcscoping parts, the outer one of said pan-ls lnlvin,'.,' scrc\V- I threaded openings therein, the inneuone of said parts having openings therein sllghtly larger than said scrcwthreaded openlngs,' nnd screws passing from the inner member through snid'openings for retaining thev pil'rts of guiid casing :uljusfuhlyln lhelr relative positions.

5. In ix mum] h0x for smmd recording or reproducing nmehiuer the 'conihinnliiun with the diaphragm thereof,

of n c: ,onler hrlescivping member. the said inner member having said outer nu-mlwr and mums uperated from within the ing cmnprising l'vm'ssml inner member anti-an shhslnntiallf'its (-ntireuuh-r :mrlnce concealed within recess of said inner member, pn ssing through bpth mem- 10 JOHN H. ELFERING.

Witnesses Emv. W. VAILL, Jr., .iumz F. GRADY. 

